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首页> 外文期刊>Cortex: A Journal Devoted to the Study of the Nervous System and Behavior >Increased cortical surface area of the left planum temporale in musicians facilitates the categorization of phonetic and temporal speech sounds
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Increased cortical surface area of the left planum temporale in musicians facilitates the categorization of phonetic and temporal speech sounds

机译：音乐家中左平面颞叶的皮质表面积增加，有助于语音和颞叶语音的分类

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摘要

We measured musicians and non-musicians by using structural magnetic resonance imaging to investigate relationships between cortical features of the left planum temporale (PT) and the categorization of consonant-vowel (CV) syllables and their reduced-spectrum analogues. The present work is based on previous functional studies consistently showing that the left PT is particularly responsive to transient acoustic features in CV syllables and their reduced-spectrum analogues, and on striking evidence pointing to structural alterations of the left PT as a function of musicianship. By combining these two observations, we hypothesized to find that differences in cortical surface area (SA) and cortical thickness (CT) of the left PT in musicians may facilitate the categorization of fast-changing phonetic cues. Behavioural results indicated that musicians and non-musicians achieved a comparable performance in the categorization of CV syllables, whereas the musicians performed significantly better than the controls in the more demanding reduced-spectrum condition. This better behavioural performance corresponds to an increased cortical SA of the left PT in musicians compared to non-musicians. No differences in CT of the left PT were found between groups. In line with our predictions, we revealed a positive correlation between cortical SA of the left PT in musicians and the behavioural performance during the acoustically more demanding reduced-spectrum condition. Hence, we provide first evidence for a relationship between musical expertise, cortical SA of the left PT, and the processing of fast-changing phonetic cues.
机译：我们通过使用结构磁共振成像来测量音乐家和非音乐家，以研究左颞颞叶（PT）的皮质特征与辅音元音（CV）音节及其降谱类似物的分类之间的关系。当前的工作是基于以前的功能研究，这些研究一致表明左PT对CV音节及其频谱减小的类似物的瞬态声学特征特别有反应，并且有明显的证据表明左PT的结构变化是音乐人的功能。通过结合这两个发现，我们假设发现音乐家中左PT的皮质表面积（SA）和皮质厚度（CT）的差异可能有助于快速变化的语音提示的分类。行为结果表明，在CV音节的分类中，音乐家和非音乐家的表现均相当，而在要求更为严格的降谱条件下，音乐家的表现明显优于对照组。与非音乐家相比，这种更好的行为表现对应于音乐家中左PT皮质SA的增加。两组间左PT的CT无差异。根据我们的预测，我们发现了音乐家左PT的皮质SA与在声学上要求更高的降低频谱条件下的行为表现之间呈正相关。因此，我们为音乐专业知识，左PT的皮质SA和快速变化的语音提示的处理之间的关系提供了第一个证据。

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